<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Document</title>
    </head>
    <body>
        <script>
            //进行全部比较，条件满足执行{}下的代码
            let box1 = Number(window.prompt());
            let box2 = Number(window.prompt());
            let box3 = Number(window.prompt());
            if(box1>box2&&box1>box3){
                alert("第一个大")
            }else if(box2>box1&&box2>box3){
                alert("第二个大")
            }else if(box3>box2&&box3>box1){
                alert("第三个大")
            }
        </script>
    </body>
</html>
